Patent US3557557A successfully refreshed from Google Patents.
US3557557A
Expired / Lapsed
US
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Engine air precooler and ice eliminator
Assignee: Motors Liquidation Co
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Filing: 1969-11-24
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Granted: 1971-01-26
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Expires: 1989-11-24
Abstract
Abstract A JET ENGINE USING CRYOGENIC FUEL PRODUCES LIQUID AIR BY INDIRECT HEAT EXCHANGE BETWEEN COMBUSTION AIR ENTERING THE ENGINE AND THE FUEL. A PART OF THE LIQUID AIR ENTERSPRAYED INTO THE ENGINE AIR INLET AHEAD OF THE HEAT EXCHANGER TO COOL THE AIR SUFFICIENTLY TO FREEZE MOISTURE SO THAT IT PASSES THROUGH THE HEAT EXCHANGER AS A SOLID AND DOES NOT FREEZE OUT ONTO THE HEAT EXCHANGER WALLS.
Inventors
- 👤 Otakar P Prachar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:31
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/02; F02; F02C; F02C7/00; F02C7/12; F02C7/14; F02C7/141; F02C7/143; F02C7/22; F02C7/224; F02K; F02K9/00; F02K9/74; F02K9/78; F28; F28D; F28D7/00; F28D7/16; F28F; F28F19/00; F28F19/006; F28F9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |